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1.
Another word refering to dragons in general. Expecially ancient and powerful dragons.
The wyrm pounced upon the cow, picking it up in its teeth and flying away.
by Aradoom August 05, 2006
 
2.
a kind of dragon , particulary an undead dragon/ zombiefied dragon
the frost wyrms from the game warcraft III are undead dragons risen from the dead by the lich king.
by shadow wyrm April 07, 2006